No Sniggering!
And no I dont mean the 4wd and transfer box knobs....
I have 4(or is it 5) black push/pull knobs on the dash just to the right of the radio area but not on the main instrument pannel on my Series 3 I just bought. They light up when pulled, but they dont seem to do anything, I know they are not the dash lights, fan, side, head or main beam, so what are they! They are quite a tidy install so don't immediately look like after market lights etc.
I cant see anything in the Haynes manual, I cant find any series3 dash pictures on the net with them on. Any Ideas. My car used to be a tow truck so they could be related to that (its got holes in the roof for flashing lights/work lights etc)
Also what are the best manuals, Haynes is "ok" but I allways like a second source.